If it's a well known protocol then I find using he acronyms very helpful (ie...RDP = TCP/3389)
If it's a well known hostname, something meaningful to you or other staff, using hostnames is acceptable to me (ie...EXCHANGE = 1.1.1.1/32)
If it's a service port that is not well known and is unfamiliar to most everyone, using the destination port for the name I've seen work real well (ie...7797 = TCP+UDP/7797); same is true for devices that may not have a hostname.
I think that it's up to you and what is truly logical for your environment and for ease of management. I would certainly suggest keeping it simple. Security and names doesn't have to be complicated.